Leases - Operating Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets	$ 10,353	$ 0
Accrued liabilities	(1,242)
Long-term operating lease liabilities	(9,970)	$ 0
Total lease liabilities	$ (11,212)